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Bland-White-Garland syndrome (BWFS) is an abnormal arising of the left coronary artery (LCA) from the pulmonary artery trunk (PA), (in English-speaking literature ALCAPA – anomalous left coronary artery arising from the pulmonary artery) and it is rather rare pathology, 0,24-0,45% of cases of all congenital heart diseases. There are infantile and adult types described. In most cases, this anatomic anomaly is found at children or teenage age. We present the observations of patients with the BWGS adult type in this article and analyze possibilities of ECG while diagnosing this rare condition.

48 patients from 100 with total blockade of the left peduncle of the bundle of His and with sinus rhythm had a normal fraction ejection (FE) and 52 patients didn't have it. 94,2% of patients in the group with reduced FE and 85,5% of patients in the group with normal FE of the left ventricle were patients of the second period of mature age and the elderly age.